we are just armed with international law. this is our sea. this is our land. this is our sky. you shouldn't be here. >> these activists know by challenging the blockade israel may stop or attack them. with two-thirds of the people in gaza living on less than $2 a day, these people feel like they have nothing to lose. >> for israel, the blockade is about security. mil taints have fired rockets from gaza into israel. so israel says to prevent that, it must block imports like cement that have been used. >> for palestinians, this is about their livelihood. where sewage sometimes runs through the streets, power cuts are more than 12 hours a day. gazans say the blockade increases their suffering. >> unemployment in gaza is over 40%. there is a saying that in each bag of cement, there are more than 45 jobs. but the blockade is meant that construction projects like this one have ground to a halt. >> that's made economic conditions here more miserable. >> mohammed alawani and his 7 children are owed a new house. his was bulldozed in 2004 by the israeli. because of the blockade, he is a